Dualcaster Mage + Extract from Darkness + Bartolomé del Presidio

Dualcaster Mage

Extract from Darkness

Bartolomé del Presidio

How it works

1. Cast Extract from Darkness by paying its mana cost
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, targeting Extract from Darkness.
4. Holding priority, activate Bartolomé del Presidio by sacrificing Dualcaster Mage.
5. Resolve the Dualcaster Mage trigger, copying Extract from Darkness
6. Resolve the Extract from Darkness copy, causing each player to mill two cards and returning Dualcaster Mage from your graveyard to the battlefield.
7. Repeat from step 3.

This ingenious loop turns a simple recursion spell into an endless engine of life and death. You kick things off by casting Extract from Darkness, then flash in Dualcaster Mage so its enters-the-battlefield trigger targets the original spell. Before that copy resolves, you feed Dualcaster Mage to Bartolomé del Presidio as a snack, sending the Mage straight to your graveyard. The copied Extract from Darkness then resolves, milling players and hauling Dualcaster Mage right back onto the battlefield to copy the original spell all over again.